<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
        "http://www.w3.org/TR/html4/loose.dtd">
<html>
    <head>
        <title>Tmp</title>

        <style type="text/css">
            h1 {
                border-bottom: 1px solid black;
            }

            h2 {
                text-decoration: green underline;
            }

            /* group */
            h1, h2 {
                font-family: sans-serif;
                color: red;
            }
        </style>

    </head>
    <body>
        <h1>h1</h1>
        <h1>h1</h1>
        <h2>h2</h2>
        <h3>h3</h3>
        <p>p</p>

    </body>
</html>